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Uninterruptible Power Supply for Desktop (UK)

335 Views 5 Replies Latest reply: Jun 6, 2013 5:43 AM by dwb RSS
Hamper Level 1 Level 1 (0 points)
Currently Being Moderated
Jun 5, 2013 12:29 PM

I am used to the convinience of a MacBook, which cares littl for being tethered to the mains or not or whether the power cuts, but of course things are a little different for Desktops.


I live in the UK and would like to know if anybody has purchased a UPS for a sensible price, just for home use. I should imagine I only need to plug my Mac mini and screen in, the occasional external HDD too, but nothing much beyond that.


Maplin have poor ratings (and, it seems, no Mac support). I am not sure where to buy it from, idealy on the high street as the cost of shipping would be punnishing to the wallet.



  • dwb Level 6 Level 6 (19,675 points)
    Currently Being Moderated
    Jun 5, 2013 1:30 PM (in response to Hamper)

    Check out Amazon UK - I've been happy with APC at work and home. This unit may be a good fit for your use - it is similar to the one I have for my home server, cable modem, and WiFi router - I like the hot swap battery feature. The previous APC unit had replacable battery cells but it had to be taken half way apart to get to the batteries.


    Mine came with a USB cable that plugs the battery into the computer and it is compatible with the Mac energy saver control panel. I set the computer to shut itself off after 5 minutes and tested that it worked. It did. When the power flickers (as if does here in rural USA) my server doesn't miss a beat.

  • dwb Level 6 Level 6 (19,675 points)
    Currently Being Moderated
    Jun 5, 2013 3:20 PM (in response to Hamper)

    Shutting down: when the UPS is connected to the computer and you configure the energy saver for shutdown the computer attempts a controlled shutdown. Not all programs are well behaved all the time though. I generally don't walk away from my computer with unsaved data (that should be everyone's habit) so it isn't an issue for me.


    How much time: that depends on how much power your devices draw and how big UPS is. APC has a configuration helper on its web site to help you decide which is best for you. In my case, I know if power is out for 5 minutes it is likely to be out more than 20 minutes and what I deal with mostly is a nearly weekly flicker outage - just enough that the computer goes off. At work we take a different approach and went with BIG devices that power core services for up to 90 minutes. You don't want to know how expensive that is

  • dwb Level 6 Level 6 (19,675 points)
    Currently Being Moderated
    Jun 6, 2013 5:43 AM (in response to Hamper)

    Have you ever set the energy saver of your mini to do a scheduled shut down? When you set that up, if the computer is asleep when the scheduled shutdown time is reached the computer wakes up and then shuts itself down. The UPS is going to work the same way after you configure the energy saver for UPS mode. The Mac doesn't need special software, it uses the energy saver control panel.


    Your mini should be drawing around 90 watts. What is the display and external drive rated at? I know my kit draws just over 200 watts so theoretically my UPS will give me a bit more than 10 minutes of power. I do a bimonthly test and that's just about what the energy saver shows as well. Add up the total wattage of your kit. The APC site should have a graph for each model showing its up-time for wattage drawn so you can compare models to your wattage.


    Remember, the longer the device needs to power your kit the more expensive it is. If all you really want to do is experience a controled shutdown when the power goes out you don't need a big UPS. On the other hand, if you want to continue working for x number of minutes (or hours) while the power is out then you need the bigger model. Only buy as much as you need but also don't buy too little. Clear as mud, right?


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